458 CDUS41 KLWX 110523 CLIIAD CLIMATE REPORT NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC 1223 AM EST FRI DEC 11 2020 ................................... ...THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR DECEMBER 10 2020... CLIMATE NORMAL PERIOD: 1981 TO 2010 CLIMATE RECORD PERIOD: 1960 TO 2020 WEATHER ITEM OBSERVED TIME RECORD YEAR NORMAL DEPARTURE LAST VALUE (LST) VALUE VALUE FROM YEAR NORMAL ................................................................... TEMPERATURE (F) YESTERDAY MAXIMUM 54 1:08 PM 70 1966 47 7 56 MINIMUM 24 6:25 AM 4 1989 28 -4 37 AVERAGE 39 38 1 47 PRECIPITATION (IN) YESTERDAY 0.00 2.26 1992 0.11 -0.11 0.21 MONTH TO DATE 0.99 1.09 -0.10 1.19 SINCE DEC 1 0.99 1.09 -0.10 1.19 SINCE JAN 1 44.64 39.67 4.97 39.03 SNOWFALL (IN) YESTERDAY 0.0 2.6 1992 0.1 -0.1 T MONTH TO DATE T 0.9 -0.9 T SINCE DEC 1 T 0.9 -0.9 T SINCE JUL 1 T 1.4 -1.4 T SNOW DEPTH 0 DEGREE DAYS HEATING YESTERDAY 26 27 -1 18 MONTH TO DATE 251 257 -6 251 SINCE DEC 1 251 257 -6 251 SINCE JUL 1 918 1173 -255 1114 COOLING YESTERDAY 0 0 0 0 MONTH TO DATE 0 0 0 0 SINCE DEC 1 0 0 0 0 SINCE JAN 1 1406 1178 228 1524 ................................................................... WIND (MPH) HIGHEST WIND SPEED 9 HIGHEST WIND DIRECTION S (180) HIGHEST GUST SPEED 13 HIGHEST GUST DIRECTION NW (310) AVERAGE WIND SPEED 2.9 SKY COVER AVERAGE SKY COVER 0.1 WEATHER CONDITIONS THE FOLLOWING WEATHER WAS RECORDED YESTERDAY. FOG RELATIVE HUMIDITY (PERCENT) HIGHEST 92 11:00 PM LOWEST 52 1:00 PM AVERAGE 72 .......................................................... THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TODAY NORMAL RECORD YEAR MAXIMUM TEMPERATURE (F) 47 71 1979 MINIMUM TEMPERATURE (F) 28 3 1968 SUNRISE AND SUNSET DECEMBER 11 2020......SUNRISE 7:19 AM EST SUNSET 4:48 PM EST DECEMBER 12 2020......SUNRISE 7:20 AM EST SUNSET 4:48 PM EST - INDICATES NEGATIVE NUMBERS. R INDICATES RECORD WAS SET OR TIED. MM INDICATES DATA IS MISSING. T INDICATES TRACE AMOUNT. $$